1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.util;
24  
25  import com.liferay.portal.kernel.log.Log;
26  import com.liferay.portal.kernel.log.LogFactoryUtil;
27  
28  import java.lang.reflect.InvocationTargetException;
29  
30  import java.util.Comparator;
31  
32  import org.apache.commons.beanutils.PropertyUtils;
33  
34  /**
35   * <a href="PropertyComparator.java.html"><b><i>View Source</i></b></a>
36   *
37   * @author Patrick Brady
38   * @author Raymond Augé
39   */
40  public class PropertyComparator implements Comparator {
41  
42      public PropertyComparator(String propertyName) {
43          this(new String[] {propertyName}, true, false);
44      }
45  
46      public PropertyComparator(String[] propertyNames) {
47          this(propertyNames, true, false);
48      }
49  
50      public PropertyComparator(
51          String propertyName, boolean asc, boolean caseSensitive) {
52  
53          this(new String[] {propertyName}, asc, caseSensitive);
54      }
55  
56      public PropertyComparator(
57          String[] propertyNames, boolean asc, boolean caseSensitive) {
58  
59          _propertyNames = propertyNames;
60          _asc = asc;
61          _caseSensitive = caseSensitive;
62      }
63  
64      public int compare(Object obj1, Object obj2) {
65          try {
66              for (String propertyName : _propertyNames) {
67                  Object property1 = PropertyUtils.getProperty(
68                      obj1, propertyName);
69                  Object property2 = PropertyUtils.getProperty(
70                      obj2, propertyName);
71  
72                  if (!_asc) {
73                      Object temp = property1;
74  
75                      property1 = property2;
76                      property2 = temp;
77                  }
78  
79                  if (property1 instanceof String) {
80                      int result = 0;
81  
82                      if (_caseSensitive) {
83                          result = property1.toString().compareTo(
84                              property2.toString());
85                      }
86                      else {
87                          result = property1.toString().compareToIgnoreCase(
88                              property2.toString());
89                      }
90  
91                      if (result != 0) {
92                          return result;
93                      }
94                  }
95  
96                  if (property1 instanceof Comparable) {
97                      int result = ((Comparable)property1).compareTo(property2);
98  
99                      if (result != 0) {
100                         return result;
101                     }
102                 }
103             }
104         }
105         catch (IllegalAccessException iae) {
106             _log.error(iae.getMessage());
107         }
108         catch (InvocationTargetException ite) {
109             _log.error(ite.getMessage());
110         }
111         catch (NoSuchMethodException nsme) {
112             _log.error(nsme.getMessage());
113         }
114 
115         return -1;
116     }
117 
118     private static Log _log = LogFactoryUtil.getLog(PropertyComparator.class);
119 
120     private String[] _propertyNames;
121     private boolean _asc;
122     private boolean _caseSensitive;
123 
124 }